I think the main problem is that you get different games on iPad and android and if it's a cheap tablet, then some games she might have played on the iPad may not be compatible with the tablet.
I gave DS my old phone because I didn't want him playing on my new one, thinking he wouldn't know the difference, but then there was a game which worked on my phone and not my old one, and he was always asking to play on mine because of that. Now, again, we have a tablet and the phones and the tablet runs better games than my phone, he sees an advert for the new game and wants to play it, but it only works on the tablet. Hence, he is asking to play the tablet more often because it's something new and different.
Then he threw it on the floor too many times in temper and I decided he isn't really old enough to have an expensive gadget like that even if it is an old one, so I took it off him. He can still play games on mine but he has to ask!